Graphical user interface for a display screen



The single FIGURE is a front view of a graphical user interface for a display screen.

The broken lines in the drawings are for purposes of illustrating display of the embodiment with a user interface or display panel, and form no part of the claimed design. The broken line drawings of the text and images are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a graphical user interface for a display screen, as shown and described. 